General Knowledge 12

The most of the skids

It won't happen with radial tires
roads with new pavement, the high temperatures making easy skids
They are because driving too fast or stopping too fast
It could happen when the truck travels more than 55 miles on flat roads

When a truck or commercial vehicle is following another commercial vehicle, it has to be in a big considerable distance behind, so you can let many commercial vehicles enter (in that space) without any danger

Check Tires Every 3 Hours or 150 Miles
Check Tires Every 4 Hours or 200 Miles
Check Tires Every Hour or 75 Miles
Check Tires Every 2 Hours or 100 Miles

When in some emergencies, you may have to drive off the road and onto the shoulder in order to avoid collision with another Truck, you should avoid

Keeping one set of wheels on the pavement only
Using the brake until your speed has dropped at least to about 20 mph.
Coming to a complete stop before returning to the road no matter what.
All of the above

If the management feels heavy or hard, it is likely to be a sign of

Battery failure
Problems with the tires.
Brakes worn.
Engine problems.

What does it mean: the order “bottoming out” refers to in an air brake system?

If the brakes are hot
If the brakes are wet during freezing weather
When you are testing the spring brakes
All of these answers

What is the first thing you should do at the accident scene

Call for the authority
Help the hurt people
Protect the area

That should be used for electric fires and burning liquids

A B: Type C fire extinguisher only.
An extinguisher type A: B: C or B: C.
Water
What is available at the moment?

Which of these statements about backing a heavy commercial vehicle is considered to be true?

You should use a helper and communicate with hand signals.
Backing is always dangerous.
You should back and turn toward the driver's side when is possible.
All of the above are true.

What is the authoritative number of red reflective triangles that you should carry?

1
3
7
5

What causes brakes to fade?

Using the brakes too lightly when going downhill
Coasting
Frozen brake pads
Slowing down from high speeds too rapidly

What is the excellent thing unrest if you are tired?

Drink plenty of coffee to stay awake
Take pills to keep you alert
Plan your trips for the middle of the night to avoid traffic
Get enough sleep

What is a tractor jackknife?

Another term for hard steering
A gadget used in the hydraulic system
A drive-wheel skid
A sample of trailer truck

Which of the following is NOT true when driving over a curve?

You should slow down before the curve
You should break during the curve
The higher your truck's center of gravity is, the easier it is to roll over
You should be in a gear that allows you to accelerate during the curve

What is The Gross Combination Weight Rating

Maximum total weight of a single vehicle plus its load specified by the manufacturer in writing.
Maximum total weight of a power unit plus trailer( s) plus the cargo as specified by the manufacturer.
The to]otal weight of a single vehicle plus its load and no more.
The total weight of a powered unit plus trailer or trailers and the cargo and no more.

Which of these answers about double-clutching and shifting is true?

Double clutching should only be used with a heavy load
You can use the tachometer to tell you when to shift
Double clutching should not be used when the road is slippery
The double clutch is only used for tankers

Which of these statements about railroad crossings can be considered a safe practice?

Look left because trains only travel from left to right.
Stop right on the tracks to look up and down the track more easily.
Look right because trains only travel from right to left.
Open the forward door if it helps you see or hear an approaching train.

Which of the following is a sign of a tire failure?

The steering wheel pulls to the side.
Vibration
A strong "bang"
All of the above

If your truck is in a traffic emergency and may collide with another commercial vehicle like a truck. Which of the following options is the best way to act on it?

You can almost always turn to avoid an obstacle more quickly than you can stop.
Leaving the road is always more risky than hitting another vehicle.
Stopping is always the safest action in a traffic emergency.
Leaving the road is always less risky than hitting another vehicle.

One of the steps in shifting up is to

Release the clutch and shift to neutral.
Increase engine and gear speed to the RPM required.
Push the accelerator and shift to neutral.
Press in the clutch and shift to the higher gear at the same time.

Which of the following statements about tank vehicles is TRUE?

Tank vehicles transport only liquids.
Tank vehicle refers only to those vehicles having a permanently attached tank.
Special skills are required to haul liquid in tanks.
All tank vehicles have some sort of bulkhead.

The only way to stop the skid when a front-wheel skid occurs is to

Brake harderd than ever.
Turn sharply inmediately.
Let the vehicle slow down.
Increase acceleration no matter what.

Which of these is a good thing to do when driving at night?

Keep your speed enough that you can stop within the range of your headlights
Watch directly at oncoming headlights briefly.
Keep your instrument lights full on
Use sunglasses to reduce headlight glare

When in some emergencies, you may have to drive off the road and onto the shoulder in order to avoid collision with another vehicle, you should avoid

Keeping one set of wheels on the pavement only
Using the brake until your speed has dropped at least to about 20 mph.
Coming to a complete stop before returning to the road no matter what.
All of the above

You truck is in a traffic emergency and may collide with another vehicle if you don’t take action. Which of these is a good rule to ember at such a time?

Stopping is always the safest action in a traffic emergency
You can almost always turn to miss an obstacle more quickly than you can stop
Leaving the road is always more risky than hitting another vehicle

What is an escape ramp?

A ramp commonly found on freeways in California used to get around major accidents.
A ramp leading to a long bed of loose soft material to slow a runaway vehicle, sometimes in combination with an upgrade.
Another term for an off ramp.
None of the above

Of the consequently, which is NOT a common case of medium fires?

Spilled fuel after an accident.
Loose air lines
Improperly sealed flammable cargo.
Electrical short circuits due to loose connections.

What maintains the air pressure in the air brake system?

Gently step on the brakes. This presses the liners against the drums or brake discs and prevents mud, silt, sand and water from entering.
Go slower.
When you are out of the water, keep a slight pressure on the brakes for a short distance to heat and dry them.
All of the above

If one-fourth of a multi-leaf spring is missing, which of the following is most likely to happen?

It will make a pop-pop-pop noice
It will put the vehicle out of functioning
It will make it hard to steer
It will have no effect

You should see approximately ______ ahead of your commercial vehicle truck when you are driving.

2 blocks, at lower speed,
1 block, at lower speed,
1/2 block, at lower speed,
3 blocks, at lower speed,

Which of the following should you NOT do if you suspect that one of your vehicle’s tires has blown out?

Keep driving until you are certain it was one of your vehicle’s tires that blew.
Hold the steering wheel firmly.
Stay off the brake.
Check all tires after stopping.

Your vehicle is going down a long hill, and your brakes begin to fail. What should you do?

Pump the brake pedal
Downshift
Put the gears in neutral
Look for an escape ramp or an escape route

Just after connecting the airlines and before moving back under the trailer, you must:

Low center of gravity
A high center of gravity and the fluid increase of the cargo transported
Nothing danger pass with the tank and liquids
"A" and "C"

After February 7, 2022, the SMCIA USA government changed CDL License curriculum classes – FMCSA DOT DMV CDL rules. Do You Know What ELDT is?

FMCSA’s Entry Level Driver Training (ELDT) regulations set the baseline for training requirements for entry-level drivers
FMCSA’s Entry Level Driver Training (ELDT) are the new CDL quizzes for general knowledge, combination vehicles and air brakes
FMCSA’s Entry Level Driver Training (ELDT) regulations only are neccessary if you are from Canada or Mexico
FMCSA’s Entry Level Driver Training (ELDT) regulations is an optional course to improve the CDL license acknowledgment; DMV recommends taking this course

To prevent skidding, which happens when tires lose their grip on the road. You should

Turn the wheel sharply for all turns every second.
Fully accelerate to give power to the drive wheels.
Adjust to conditions while driving.
Brake hard at all stops and no more.

In the event a cargo fire in a van or box trailer, you must

Keep the doors closed
Keep the doors open
Drive to the closest service station for help
Park close to the road so other vehicles can see the danger and call to the firemen

What is the excellent way to has a handle on the sides and rear?

A Helper.
Your mirrors
Roll the window down.
Rear view cameras.

What should you do before driving on a mountain?

Unlock the steering axle brakes.
Carry tire chains in the truck.
Know the escape ramps location on your route.
None of the above.

Perception distance is the distance since your vehicle travels to
the time.

Your eyes see a hazard, until the time your foot push the brake pedal
The brain tells your foot to push the brake pedal, until the time your foot push the pedal
Your eyes see a hazard , until the time your brain recognoizes it's a hazard

Which of these sentences about staying alert

If you have to stop and take a nap, it should be in a rest area or truck's stops, never on the shoulder of the road
A half hour break for coffe will do more to keep you alert than a half hour nap
Sleep is the only thing that can overcome fatigue

Which of the following can be considered an effect of drinking and driving?

Driving in the wrong lane
Making quick, stupid movements
Running traffic signs
All of the above

Which of these sentences about staying alert is true?

If you have to stop and take a nap, it should be in a rest area or truck's stops, never on the shoulder of the road
A half hour break for coffe will do more to keep you alert than a half hour nap
Sleep is the only thing that can overcome fatigue

Off-ramp and on-ramp posted assist limits are constantly safe for rich and front vehicles.

True
False

Which of these is true about drive skids of rear wheels?

With vehicles towing trailers, the trailer can push the towing vehicle sideways
The front wheels usually slide sideways in an attempt to 'catch up' with the rear tires
Locked wheels have more traction than rolling wheels

The most of the skid

They are because driving too fast or stopping too fast
It won't happen with radial tires
Pasan en hielo

At 55 miles-per-hour, it takes roughly 6 seconds to stop a fully loaded truck, and the braking distance is…

About the length of a football field or 100 yards
About 1/4 mile
About two truck lengths
About two car lengths

If you have a tank vehicle with a high center of gravity

You should take highway curves or on-ramp/ off-ramp curves well below the posted speeds.
You should always take highway curves or on-ramp/ off-ramp curves at least five miles above the posted speed.
You cannot turn over at the speed limit posted for curves never.
This is top-heavy, but not easy to rollover anyway.

Which of these sentences is true?

When double clutching, you should let the RPM's decrease while the clutch is released and the shift lever is in neutral
When you downshift for a curve, you should do it just before entering to the curve
When you downshift for a curve, you should do so before you enter the curve

Select the three things that add up to the total stopping distance for your truck or bus?

Sight distance, correspondence distance, and brake distance
Perception distance, reaction distance, and braking distance
Attention distance, reaction distance, and slowing distance
Brake distance, reaction distance, and attention distance.

The three fundamental types of inspections are pre trip, everywhere a trip, and after a trip.

True
False

Wet brakes can cause ____

Brakes to apply unevenly
Lack of braking power
All of these
Pulling to one side or the other

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